From: Bjorn Brandstedt (super_deuce@hotmail.com)
Date: Sun May 25 2003 - 04:59:24 PDT
Joe,
In the cradel or the bed...that's witty!
About the fuel compensator, I have a copy of the patent of the device pinned
on the wall in front of me. The "fuel viscosity control device" was patented
back in 1963 ( No 3,204,623, Isley and Druzynski, Contintental Motors).
The purpose of it is to adjust the amount of fuel supplied to the
injection pump based on the density of the fuel. It turns out that there is
a direct relationship between the density and the "heating value".
For the engine to produce the same power output with, say gasoline, as
diesel a greater volume is needed and the fuel compensator makes the
adjustment by moving a cam, which in effect does the same thing the external
adjustment screw does.
When the pump leaves the factory the compensator is calibrated for diesel as
a reference and the external adjustment screw is sealed. No further
adjustment should be needed.
If you (Jack) have to adjust the screw to get the engine running, perhaps
the compensator is hung up. If you make the manual adjustment to get more
fuel and the compensator later decides to go back to work, there may be way
to much fuel available... stay on the alert!
If the fuel compensator wasn't there, one could manually adjust the fuel
delivery screw for each type of fuel used. The compensator, just does it
automatically.
Why it is bypassed is unknown to me, perhaps it is a liability (=prone to
failure or malfunction).
I'd like to think that it is doing its job on my deuce, I sometimes put
leftover kerosene or gas in the fuel tank to mix with the diesel and if I
decide to try biodiesel the fuel compensator may help.
Have a great day!
Bjorn
Meadows of Dan, Virginia
>From: "GOTAM35" <gotam35@sc.rr.com>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] M35 Tweeking, no it's compensator time
>Date: Sat, 24 May 2003 23:48:42 -0400
>
>
>----- Original Message -----
>From: "Bill & Bonnie Prestin" <bprestin@chartermi.net>
>
> > When I bought my LDS465-1A engine, it came as a Gov. rebuilt engine
>in
> > the can. One of the tags hanging on the engine said "use diesel fuel
>only"
> > because the compensator had been by-passed. It also came with a sealed
>bag
> > of fittings and small pieces of tubing with a set of directions on how
>to
> > un-bypass the compensator. "in case of the need for use of alternate
>fuels"
> >
> > Bill
> > Michigan
> >
>
>
>I like to think of myself as a mechanical genius. I'm the only person that
>thinks that, but that's OK. At any rate, one of the engines I have has the
>same by-passed compensator. I have been studying it and the one in my
>truck, which is not by-passed, and I can't see how the rearranging of the
>fuel lines would affect the performance of the fuel. Doe's anyone know of
>a
>source for a detailed explanation of how all this works? Has anyone on the
>list here put a page on their web site with a little diagram or
>explanation?
>This is just a curiosity thing, but some of the mechanics I have talked to
>suggest removing the compensator all together. I like having the option to
>run alternative fuels if I get in a pinch but is that really likely? (I
>don't know, that's why there's a question mark at the end of that sentence)
>
>Joe Trapp
>
>
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